I used about a table spoon of Downy Infusions new Honey Flower liquid fabric softener into plain hot water in my personal Rug Doctor carpet shampooer and WOW does it smell good. Plus the added bonus of soft carpets.
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I use this when I was my towels and sheets and my whole family loves the smell! I just put it in with my unscented laundry detergent. A little expensive, but worth it! I don't use on my clothes because I don't like them to smell to perfumy.
Downy just came out with a product called "Unstopables" (yes, there's only one P in it!) I am totally addicted to the "Fresh" scented one! Makes your laundry smell incredible! The "Lush" scent, though... Not so much.